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@uitrit taire @stmt @ffice ABIJAH e-iiunti., 'or SHARON, ooNNECrrCun-,nssieNoR iro H1MsELF,OE.1 .-u CAPnON, OF SPRINGFIELD, omo-.AND GEORGEWCAPRON, or sun-RON, CONNECTICUT.

LettesPqtent 75,761, 'dated March 24, 1868.-

'IMPRVED MAGHINE FOB. HULLING GRAIN.'

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fro ALL' WHO'MIT M AY CONCERNE)` l l p p VBe it known that I, ABJAH HUBBELL, 'of- Sharon, in the county of Litchfield, 'and State'of Connecticut,

v,have invented a new 'and improved Machine forHnl-ling Gi-ain; and I do vhereby declare that the following isa Tull, Clear, and exact description thereof, "which wil'lfenable l,others skilled in the art to make and use the same,

V@tiefer-ence being had to the accompanying.drawingsfforming partei' this specification.

l l The object'cf `this invention is to provide n machine, whereby all kinds ,of grain, but especially buckwheat, may be eil'ectu'ally hulledand scoured,.so that the outer-unwliolesome hull may thereby be completely remoyed, leavirig onlythcfnutritions inner portion of the grain. The flour made from grain thus lcletnedirl brilliant and perfectly white, and far superior to that made iii-the usual manner.4 l e s The' invent-ionconsists in4 the use of two burr-niillstones, which areso arranged that they can be easily set truc'. They Sie set far enough apart-that the grain between theni 4is'nicely shelled without being. crushed. The grain ,is then cleanedin afan-arrangemengor in any other suitable device. In the annexed drawing my inven- 4'tion isillustrated* n Figure-1 being a vertical' longitudinal section of my improved machine for cleaning grain, the plane of .section beingindicated by the'linefrr: x,- Ig. 2. ,y

I l"liigure-'2A-is a front-elevation" of the same.Y

g Figure y3V isia horizontal sectional view: of the same, the'plane of section being indicatedby the' line y,3/,iig.r 1.. 'l V Figure 4 isadetail vertical sectional view, the plane of section being indicated by the line z a, iig. 3.' Similar letters oli"` reference indicate like parts. 4

represents a frame, made of wood or other suitable material, and consisting of sleepers or hed-timbers al, nprigbts,v b. b, and braces, cfa, as'shown in the drawings. Injthe same are arranged suitable boxes for` the ver- 'tical shaft VB `to run in. A whee'LLf-C, is mounted on the shaft B, so as torcvolve with it. This wheel I prefer to ineke of solid French burr-millstone.' Around the wheel C, and s ome distance from its circumference, is secured, uponthe frame A, a. metal ring, c2, which is considerably` higher than the stone, C, so as to form :ifcir cular channel, c, around C, as 'shown 'in Egs. 1 and 3. Thering o2 is partly covered .by straps, j', in which are arranged two'bolts,'g, opposite to each other, tothe-lower ends'of which a ring, h, is pivoted, as shownin fig.- V4,V so as to swing freelyV ,on itsl pivots.` `Withinthe ring is 'pivoted the upper Aannular stone, D, so'as to swing Y .fleevon its pivots.. By' this mannervof hanging it, the stone, D, may be easily adjustediand stcadied by lowering four (incre `or less) screws'z', which are arranged in the straps f, as shown.V 4The upper bearings K, for the shaft B,'are also secured stationary on the strapsf, as shown, in such a-'manner as to allow the shaft to slide up and down therein. 4' g 1 Theilovwcr e'nd of'the shaft B rests4 upon a step arranged on a bar, l, which is pivotedto. the frame A, and is adjustable up und down oiiits pivot, sozthat the stone, C, may be brought closer to or fnrtherffrom the stone, D, and be held in any desiredposition by a screw,m, passing upthrough a plate, m', as shown; "Before beginning to operate,the lower stone is brought up against the upper one, and the latter then stcadied by lowering the screws z'.' The stones are then ground together, pouring water in between them until theyare completely true. The stone, C, is' then lowered the required distance, and the stone, D, made ilexible by raising the screws z', andthe .operation of cleaning may then be begun.

Tc the top of the shaft B `is attacheda vertical pin, n, eccentric with the shaft. 4This passes through a slot a. hinged shaker', E, or in a cross-bar secured tothe same, and as the shaft B is revolved by meanslof a belt passing around a., pulley, o,`or lfotherwise, the required shaking motion is 'imparted to thc screw E, which is hinged atits upper end tothe frame A, at its`1owerend to uprights @which are secured by hinges tothe coverfof Vtheriu'g d, asshown. The bottom of the screen E isperforatedl with very`ne holes toseparate thedust'from thev grain. At its lower end-nre coarser holes, throughwhich the grain drops into a hopper, q, arranged above theannular channel in the stone, D, as shown, and thence the grain is brought between the stones and-is hulledi By centrifugal motion, it is .brought to the rim of the stone, D, and drops into the channel e. Tothe periphery of the stone, C, are secured plates r, which sweep the ehannele as the stone revolves, and wherebynll the grain! hulls, &c., are brought into` a tube, F, and drop thence intoa large inclined tube, G, .which is open on' top.

A- strongy current of -air is forced into -the tube G, by means of a fan, II, on shaft B, and the light hulls,

`dust, 83o., are thrown out at'the upper end of G, thedust, which is 'teo' heavy to be raised Aby the air, falling through the perforated parts y of tube G, iig. 2.4 The heavier grain escapes through agate at the lower end of tube G, and will then be well cleaned and freed from the hulls, whereby the value of the flour madcufrom this grain is greatly'inereasetl without increasing its cost considerably.

What I claim as new, and desire to secure by Letters Patent, is

The construction 'and arrangement upon the straps fof the bearings K for the shaft B, and the adjusting, screws z' for trimming thc-stone, D, as herein set forth, for the purpose spceied.

ABIJ'H4 HUBBELL. Witnesses:

E. N. IAIAMWELL, `(I. N. LUCAS. 

